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bridge(3): clarify manpage, this is a layer2 bridge

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yes, it peeks into IP packets to handle fragmentation when sending
onto tunnel ports and does mss clamping. but it can carry arbitrary
ethernet packets just fine (between ethernets).
This commit is contained in:
cinap_lenrek 2017-12-17 20:51:41 +01:00
parent 3e48a66665
commit e31934f9f3
1 changed files with 6 additions and 8 deletions
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14
sys/man/3/bridge
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@ -1,6 +1,6 @@
.TH BRIDGE 3
.SH NAME
bridge \- IPv4 Ethernet bridge
bridge \- IP Ethernet bridge
.SH SYNOPSIS
.nf
.B bind -a #B\fIb\fP /net
@ -17,7 +17,7 @@ bridge \- IPv4 Ethernet bridge
.SH DESCRIPTION
The
.I bridge
device bridges IPv4 packets amongst Ethernet interfaces.
device bridges packets amongst Ethernet interfaces.
The number
.I b
in the bind is optional and selects a particular bridge
@ -58,7 +58,7 @@ Treat the device mounted at
.I path
(e.g.,
.LR /net/ether0 )
as an Ethernet medium carrying IPv4 and ARP packets
as an Ethernet medium
and associate it with this bridge (forward its packets to the
other interfaces associated with this bridge).
.I Ownhash
@ -67,10 +67,10 @@ is an `owner hash'.
.BI "bind tunnel " "name ownhash path path2
Treat the device mounted at
.I path
as a network tunnel carrying IPv4 and ARP packets,
as a network tunnel carrying Ethernet packets,
the device mounted at
.I path2
as an Ethernet medium carrying IPv4 and ARP packets
as an Ethernet
and associate them with this bridge
(forward its packets to the
other interfaces associated with this bridge).
@ -112,7 +112,7 @@ Set bridge
The only known option is
.LR tcpmss ,
which limits the TCP Maximum Segment Size of
TCPv4 packets passing through to 1300 bytes.
TCP packets passing through to 1300 bytes.
.TP
.BI "clear " option
Clear bridge
@ -167,5 +167,3 @@ echo 'bind ether inner 0 /net/ether1' >/net/bridge0/ctl
.IR ip (3)
.SH SOURCE
.B /sys/src/9/port/devbridge.c
.SH BUGS
Doesn't understand IPv6.